OF WASHINGTON. 23 pine and pinyon in the West, and bear some superficial resem-blance to Phloeosinus. — Mr. Knab exhibited a box containing a remarkably fine series of North American beetles of the genus Calligrapha, among which were several new species described in a paper in course of preparation. He called attention to the impor-tance of knowing the plant on which insects were living as an aid to the determination of the species. Mr. Schwarz, in com-mending the work of Mr. Knab on this difficult genus, re-marked on the great difficulty which has been experienced in preparing a synoptic table of the various genera of American Chrysomelini. The forms are numerous, and a table to be of value must be accompanied by figures of the species. — Mr. Fiske presented the following paper : NOTES ON INSECT ENEMIES OF WOOD BORING COLEOPTERA. By W. F. Fiske. During three seasons spent largely in the field upon forest insect investigations, many notes have been collected upon the natural enemies of the bark and wood-boring Coleoptera with which these investigations have principally had to do. The material thus collected, dealing, as it does, with many species of widely different habits, is particularly of value, as it serves to illustrate in a general way the existing relations between this class of hosts and their insect enemies, at the same time giving an idea of what developments may be expected along this line. Early in the investigations it became apparent that there was a remarkable difference between insect parasitism as it existed in the wood-feeding Coleoptera, and in external-feeding in-sects in general. This is most strikingly brought out in the comparative importance of hyperparasitism. Dr. L. O. How-ard, in a study of the parasites of Hcnierocampa (Orgyia) leucostigma S. & A., estimated a total of 90 per cent of the larvae and pupse infested by parasites, while at times as high as 95 per cent of some parasites were destroyed by secondary enemies. In a similar study of the parasites of the common tent caterpillar {Malacosoma americana Fab.), made some years ago in New Hampshire, it was found, when it became a
BioStor
